LIGHTPROOF Synonyms: 23 Similar and Opposite Words

lightproof

adjective

Definition of lightproof

as in waterproof

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of lightproof Indeed, the first camera was essentially a lightproof box with a pinhole-size hole in one side. — IEEE Spectrum, 11 Oct. 2023

Recent Examples of Synonyms for lightproof

Adjective

The brand has always had a strong DNA for cold weather winter boots with the waterproof element.

— Vicki M. Young, Footwear News, 9 Nov. 2026
Tile drenching extends tiles onto walls, floors, and ceilings, creating a dramatic, high-end, waterproof look.

— Maria Sabella, Better Homes & Gardens, 9 Nov. 2026

Definition of waterproof

Adjective

On the bottom level, a soundproof movie theater and 1,000-bottle wine cellar join a wellness wing with a gym, sauna, and serene rock waterfall.

— Wendy Bowman, Robb Report, 23 Oct. 2026
The soundproof curtain came up, and a crew in T-shirts (Knicks, Amoeba Music) loaded out the garret set.

— Sarah Larson, New Yorker, 19 Oct. 2026

Definition of soundproof

Adjective

Raye and the platoon of ace musicians joining her are as vocally and musically airtight as possible.

— Melissa Ruggieri, USA Today, 27 Apr. 2026
The 1984 Olympics had a relatively airtight contract that protected taxpayers, but that’s not the case this time.

— Susan Shelley, Daily News, 18 Feb. 2026

Definition of airtight

Adjective

For now, access appears limited to the steadily expanding group of organizations granted access to Claude Mythos Preview through Anthropic’s — not entirely watertight — private Project Glasswing initiative.

— Robert Hart, The Verge, 9 June 2026
Tunnels are also not truly watertight, requiring drainage measures like sump pumps and creating maintenance and reliability issues, the group advised.

— Skyler Swisher, The Orlando Sentinel, 15 Feb. 2026

Definition of watertight

Adjective

Impossible than to the hermetic paranoia of Gary Oldman in Tinker Tailor Soldier Spy.

— Scott Tobias, Vulture, 21 Oct. 2026
O’Neill, a physics professor at Princeton, argued for the practical possibility of building human habitats that would float between Earth and the moon, housing tens of thousands of people in hermetic environments with earthlike gravity and climate.

— Jacob Weisberg, Vanity Fair, 10 Sep. 2026

Definition of hermetic

Browse Nearby Words

lightplanes

lightproof

lights

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“Lightproof.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/lightproof. Accessed 15 Nov. 2026.

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Synonyms of lightproof

adjective

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